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[Komo News] UW professor aims to make time travel a reality - Page 8

post #71 of 133
Quote:
Originally Posted by Renairy View Post

Do u think it will ever be possible to travel that fast?
Not for the foreseeable future. It's beyond the realms of what's possible/practical with anything like our current technology.
Edited by MintMouse - 10/29/12 at 8:47pm
post #72 of 133
case settled, time travel is possible, and it has already been done, by austronaut's on the ISS. spending 1 year in space causes them to travel 0.007 seconds into the future. it may not seem like much at all, but it IS time travel.
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post #73 of 133
Quote:
Originally Posted by Renairy View Post

Quote:
Originally Posted by lordikon View Post

There have been many experiments. One example is particle half lifes, they're predictable, but when the particle is traveling very fast the half life is extended. Another example are GPS satellites which are traveling much faster than the surface of the Earth and so they have to adjust their timing to account for the time dilation. Atomic clocks are so accurate they have to be adjusted based on their altitude above sea level. All these adjustments in time are based on math, the same math predicts all of these effects. There are numerous tests in the Wikipedia link I've already provided your. I implore you, read it.

Do u think it will ever be possible to travel that fast?

I'm not sure it would ever be feasible, if I remember correctly the amount of energy needed to get a small ship to even 90% of the speed of light would take all of the energy you'd get by perfectly converting all of Jupiter to energy. Basically, all of Jupiter would be your fuel. Furthermore, having that much mass for fuel would make it that much harder to accelerate to those speeds.

Our best chance for traveling huge distances is by not actually travelling fast. Warp drives or worm holes, or something yet discovered or conceived.
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post #74 of 133
Quote:
Originally Posted by lordikon View Post

Well take what you know so far:
1.) Someone on Earth would watch the ship take about 4 years to get there, because it's about 4 light years.
2.) You know time elapses at about 1 day for someone traveling near the speed of light for a year on Earth.
Given those two things, 4 years for the Earth observer is about 4 days for the traveller. So how could it not seem like 4 days for them?

Riddle me this...

What if if had a two way video chat setup that used entangled particles to transmit data

And you could travel at the speed of light.

You sat on earth and had a video conference with someone travelling at the speed of light to alpha centari.

Generally speaking time should be moving slower for them however since the entangled particles transmit instantaneously at any distance The video chat should be seamless.

So what would happen?
     
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post #75 of 133
so The Matrix, Back to the Future and such are not so far fetched afterall...
Theyre just practical forms of known facts and proven theories?

Wow so its all just a matter of time? Get it.. time ? tongue.gif
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post #76 of 133
Quote:
Originally Posted by PappaSmurfsHarem View Post

Quote:
Originally Posted by lordikon View Post

Well take what you know so far:
1.) Someone on Earth would watch the ship take about 4 years to get there, because it's about 4 light years.
2.) You know time elapses at about 1 day for someone traveling near the speed of light for a year on Earth.
Given those two things, 4 years for the Earth observer is about 4 days for the traveller. So how could it not seem like 4 days for them?

Riddle me this...

What if if had a two way video chat setup that used entangled particles to transmit data

And you could travel at the speed of light.

You sat on earth and had a video conference with someone travelling at the speed of light to alpha centari.

Generally speaking time should be moving slower for them however since the entangled particles transmit instantaneously at any distance The video chat should be seamless.

So what would happen?

I believe the communication would be "live" for each of you, but the people on Earth would see the people on the ship talking at about 1/400th normal speed, and the people on the ship would see the people on the Earth talking at 400x normal speed.

Bear in mind, the numbers I'm giving depend on how close to the speed of light this ship is traveling, to see effects as strong as 1/400th of normal time you'd have to be very close to the speed of light. For example, for time to go at 1/2 normal speed, the ship would need to go about 86% of the speed of light, for time to go at 1/3rd normal speed, the ship would need to go about 95% of the speed of light.
Quote:
Originally Posted by Renairy View Post

so The Matrix, Back to the Future and such are not so far fetched afterall...
Theyre just practical forms of known facts and proven theories?

Wow so its all just a matter of time? Get it.. time ? tongue.gif

The movie Planet of the Apes is based on time travel through time dilation. The ship leaves Earth and they remain in statis at near the speed of light, when they get back millions of years have gone by. The movie skips most of the back story though.
Edited by lordikon - 10/29/12 at 9:03pm
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post #77 of 133
Quote:
Originally Posted by Renairy View Post

so The Matrix, Back to the Future and such are not so far fetched afterall...
Theyre just practical forms of known facts and proven theories?
Wow so its all just a matter of time? Get it.. time ? tongue.gif
Nope.
Going backwards in time is beyond current models of physics and the matrix has nothing to do with time-travel tongue.gif
post #78 of 133
Quote:
Originally Posted by lordikon View Post

I believe the communication would be "live" for each of you, but the people on Earth would see the people on the ship talking at about 1/400th normal speed, and the people on the ship would see the people on the Earth talking at 400x normal speed.
Bear in mind, the numbers I'm giving depend on how close to the speed of light this ship is traveling, to see effects as strong as 1/400th of normal time you'd have to be very close to the speed of light.

Ah but wouldn't that mean the entangled particles also moving differently. Since they are entangled they would have to transmit At exactly the same time. If you saw them moving at 1/400 the speed that would mean the entangled particles is also moving 1/400th the speed, defeating the entanglement
     
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post #79 of 133
Quote:
Originally Posted by MintMouse View Post

Nope.
Going backwards in time is beyond current models of physics and the matrix has nothing to do with time-travel tongue.gif

bending physics and slowing time has sumthn to do with dilation wouldn't u say?
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post #80 of 133
Quote:
Originally Posted by PappaSmurfsHarem View Post

Quote:
Originally Posted by lordikon View Post

I believe the communication would be "live" for each of you, but the people on Earth would see the people on the ship talking at about 1/400th normal speed, and the people on the ship would see the people on the Earth talking at 400x normal speed.
Bear in mind, the numbers I'm giving depend on how close to the speed of light this ship is traveling, to see effects as strong as 1/400th of normal time you'd have to be very close to the speed of light.

Ah but wouldn't that mean the entangled particles also moving differently. Since they are entangled they would have to transmit At exactly the same time. If you saw them moving at 1/400 the speed that would mean the entangled particles is also moving 1/400th the speed, defeating the entanglement

Well the entanglement's purpose wouldn't necessarily be defeated. If you were sending information at 1Mhz over the particle to the ship, they would be receiving it at 400Mhz. Still a useful connection, slower when coming from the ship, but still without any latency.
Edited by lordikon - 10/29/12 at 9:17pm
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